/*
 * Copyright 2009 Jesse McLaughlin (nzjess@gmail.com)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *         http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.travelfusion.xmlclient.test.handler;

import javax.xml.stream.XMLStreamConstants;

import org.travelfusion.xmlclient.handler.HandlesRequestsFor;
import org.travelfusion.xmlclient.impl.handler.AbstractXmlToolRequestStAXResponseHandler;
import org.travelfusion.xmlclient.test.xobject.XEchoRequest;
import org.travelfusion.xmlclient.test.xobject.XEchoResponse;

/**
 * @author Jesse McLaughlin (nzjess@gmail.com)
 */
@HandlesRequestsFor(XEchoRequest.class)
public class StAXEchoHandler extends AbstractXmlToolRequestStAXResponseHandler<XEchoRequest, XEchoResponse> {

  @Override
  protected void fillTemplate() throws Exception {
    template.gotoChild("EchoCommand").gotoChild("Value").addText(request.getValue());
  }

  public XEchoResponse handleResponse() throws Exception {
    XEchoResponse response = new XEchoResponse();

    String currentName = null;

    StringBuilder builder = new StringBuilder(32);

    done: for (int event; ((event = responseReader.next()) != XMLStreamConstants.END_DOCUMENT);) {
      switch (event) {
        case XMLStreamConstants.START_ELEMENT:
          builder.setLength(0);
          break;
        case XMLStreamConstants.CHARACTERS:
          builder.append(responseReader.getTextCharacters(), responseReader.getTextStart(), responseReader.getTextLength());
          break;
        case XMLStreamConstants.END_ELEMENT:
          currentName = responseReader.getName().getLocalPart();
          if ("Value".equals(currentName)) {
            response.setValue(builder.toString().trim());
            break done;
          }
          break;
      }
    }

    return response;
  }
}
